Skip to main content
Subscribe
Log In
More
Log in via Institution
Log in via OpenAthens
Log in via AAO
Log in using your username and password
For personal accounts OR managers of institutional accounts
Username
*
Password
*
Forgot your log in details?
Register a new account?
Forgot
your user name or password?
Basket
Search
More
Search for this keyword
Advanced search
Latest content
Current issue
Archive
Browse by collection
Authors
About
Search for this keyword
Advanced search
Close
More
Main menu
Latest content
Current issue
Archive
Browse by collection
Authors
About
Subscribe
Log in
More
Log in via Institution
Log in via OpenAthens
Log in via AAO
Log in using your username and password
For personal accounts OR managers of institutional accounts
Username
*
Password
*
Forgot your log in details?
Register a new account?
Forgot
your user name or password?
BMJ Journals
You are here
Home
Archive
Volume 86, Issue 9
The determination of sample size in controlled clinical trials in ophthalmology
Email alerts
Article metrics
Article menu
Article
Text
Article
info
Citation
Tools
Share
Rapid Responses
Article
metrics
Alerts
PDF
Editorial
The determination of sample size in controlled clinical trials in ophthalmology
Free
Online download statistics by month:
Online download statistics by month: August 2002 to November 2023
Abstract
Full
Pdf
Aug 2002
0
178
61
Sep 2002
0
129
43
Oct 2002
0
79
30
Nov 2002
0
20
12
Dec 2002
0
16
0
Jan 2003
0
10
5
Feb 2003
0
13
10
Mar 2003
0
3
3
Apr 2003
0
7
2
May 2003
0
7
5
Jun 2003
0
2
3
Jul 2003
0
8
4
Aug 2003
0
14
0
Sep 2003
0
15
13
Oct 2003
0
9
3
Nov 2003
0
8
9
Dec 2003
0
7
0
Jan 2004
0
17
0
Feb 2004
0
7
3
Mar 2004
0
20
13
Apr 2004
1
13
3
May 2004
0
9
2
Jun 2004
0
12
0
Jul 2004
0
9
1
Aug 2004
0
16
2
Sep 2004
0
30
3
Oct 2004
21
17
8
Nov 2004
8
25
3
Dec 2004
5
23
2
Jan 2005
8
12
8
Feb 2005
5
27
7
Mar 2005
20
41
9
Apr 2005
4
32
18
May 2005
14
39
11
Jun 2005
5
41
14
Jul 2005
8
36
9
Aug 2005
0
55
12
Sep 2005
4
29
16
Oct 2005
4
22
9
Nov 2005
7
31
14
Dec 2005
6
39
11
Jan 2006
5
38
10
Feb 2006
4
28
11
Mar 2006
5
37
3
Apr 2006
3
26
4
May 2006
4
55
15
Jun 2006
2
25
11
Jul 2006
2
22
5
Aug 2006
0
22
9
Sep 2006
3
69
8
Oct 2006
3
89
19
Nov 2006
0
99
24
Dec 2006
2
65
13
Jan 2007
0
110
23
Feb 2007
3
143
27
Mar 2007
1
168
20
Apr 2007
42
20
5
May 2007
27
35
15
Jun 2007
26
34
14
Jul 2007
38
66
22
Aug 2007
41
28
8
Sep 2007
15
31
9
Oct 2007
21
24
12
Nov 2007
29
31
8
Dec 2007
22
23
11
Jan 2008
22
25
6
Feb 2008
24
31
11
Mar 2008
15
22
4
Apr 2008
13
17
10
May 2008
14
27
9
Jun 2008
22
20
9
Jul 2008
24
15
5
Aug 2008
30
9
2
Sep 2008
28
13
2
Oct 2008
24
10
3
Nov 2008
18
5
3
Dec 2008
15
13
6
Jan 2009
12
6
3
Feb 2009
19
4
4
Mar 2009
18
12
2
Apr 2009
24
10
3
May 2009
6
14
5
Jun 2009
9
8
2
Jul 2009
12
7
5
Aug 2009
10
6
2
Sep 2009
3
0
0
Oct 2009
10
5
0
Nov 2009
16
2
3
Dec 2009
18
7
3
Jan 2010
23
5
1
Feb 2010
8
1
1
Mar 2010
14
2
1
Apr 2010
23
13
1
May 2010
5
3
6
Jun 2010
6
6
0
Jul 2010
3
5
7
Aug 2010
5
6
2
Sep 2010
7
4
2
Oct 2010
13
3
5
Nov 2010
6
2
3
Dec 2010
5
9
2
Jan 2011
7
4
3
Feb 2011
7
6
4
Mar 2011
6
13
0
Apr 2011
12
24
0
May 2011
9
9
3
Jun 2011
8
0
0
Jul 2011
10
0
2
Aug 2011
8
2
0
Sep 2011
10
1
0
Oct 2011
7
0
2
Nov 2011
8
12
2
Dec 2011
8
16
6
Jan 2012
4
11
3
Feb 2012
2
6
3
Mar 2012
4
40
2
Apr 2012
6
30
9
May 2012
5
33
5
Jun 2012
4
30
3
Jul 2012
9
21
6
Aug 2012
2
28
6
Sep 2012
5
18
3
Oct 2012
11
62
4
Nov 2012
0
66
10
Dec 2012
0
58
4
Jan 2013
0
39
10
Feb 2013
0
20
6
Mar 2013
0
42
7
Apr 2013
0
19
8
May 2013
0
19
5
Jun 2013
0
14
3
Jul 2013
0
10
3
Aug 2013
14
6
4
Sep 2013
1
7
2
Oct 2013
3
16
12
Nov 2013
1
27
4
Dec 2013
10
23
9
Jan 2014
5
22
4
Feb 2014
4
6
11
Mar 2014
4
5
6
Apr 2014
3
15
8
May 2014
6
10
8
Jun 2014
0
3
2
Jul 2014
6
11
10
Aug 2014
0
7
11
Sep 2014
1
8
10
Oct 2014
0
1
11
Nov 2014
0
2
7
Dec 2014
1
4
13
Jan 2015
1
5
10
Feb 2015
1
1
13
Mar 2015
5
5
16
Apr 2015
3
3
5
May 2015
2
13
7
Jun 2015
6
5
11
Jul 2015
4
2
12
Aug 2015
1
4
4
Sep 2015
3
1
2
Oct 2015
0
1
2
Nov 2015
3
1
9
Dec 2015
0
1
11
Jan 2016
1
48
9
Feb 2016
2
0
10
Mar 2016
2
1
9
Apr 2016
0
2
13
May 2016
0
7
24
Jun 2016
0
4
14
Jul 2016
1
2
9
Aug 2016
4
3
14
Sep 2016
0
4
8
Oct 2016
6
6
16
Nov 2016
3
6
15
Dec 2016
1
3
10
Jan 2017
9
4
5
Feb 2017
1
1
12
Mar 2017
0
2
12
Apr 2017
1
4
5
May 2017
1
6
35
Jun 2017
0
4
22
Jul 2017
8
8
11
Aug 2017
3
3
20
Sep 2017
51
51
15
Oct 2017
129
125
21
Nov 2017
40
40
12
Dec 2017
37
35
21
Jan 2018
16
16
8
Feb 2018
30
26
21
Mar 2018
15
15
16
Apr 2018
31
27
15
May 2018
17
18
17
Jun 2018
17
18
13
Jul 2018
17
17
20
Aug 2018
16
16
19
Sep 2018
24
22
17
Oct 2018
12
12
14
Nov 2018
11
11
16
Dec 2018
17
17
10
Jan 2019
15
13
9
Feb 2019
16
13
11
Mar 2019
8
8
16
Apr 2019
3
1
9
May 2019
15
9
9
Jun 2019
12
12
8
Jul 2019
16
14
9
Aug 2019
13
13
11
Sep 2019
14
12
5
Oct 2019
11
9
5
Nov 2019
17
17
8
Dec 2019
21
21
13
Jan 2020
13
13
11
Feb 2020
15
12
4
Mar 2020
16
16
5
Apr 2020
23
21
4
May 2020
18
18
4
Jun 2020
19
19
2
Jul 2020
17
14
5
Aug 2020
16
12
10
Sep 2020
22
22
8
Oct 2020
19
19
7
Nov 2020
14
13
9
Dec 2020
47
32
17
Jan 2021
13
13
7
Feb 2021
10
10
6
Mar 2021
20
18
14
Apr 2021
2
2
5
May 2021
12
11
8
Jun 2021
20
20
17
Jul 2021
24
25
16
Aug 2021
21
21
18
Sep 2021
20
20
13
Oct 2021
26
26
29
Nov 2021
12
12
29
Dec 2021
9
9
14
Jan 2022
12
13
10
Feb 2022
14
12
4
Mar 2022
38
40
8
Apr 2022
22
24
16
May 2022
33
29
20
Jun 2022
28
26
13
Jul 2022
23
25
7
Aug 2022
36
37
9
Sep 2022
16
16
16
Oct 2022
22
25
15
Nov 2022
19
19
7
Dec 2022
23
22
9
Jan 2023
33
35
5
Feb 2023
35
37
10
Mar 2023
17
21
11
Apr 2023
7
7
11
May 2023
9
9
10
Jun 2023
12
12
8
Jul 2023
8
8
5
Aug 2023
7
5
7
Sep 2023
19
20
17
Oct 2023
12
10
10
Nov 2023
23
15
5
Total
2762
5221
2312
Read the full text or download the PDF:
Subscribe
Log in
Log in via Institution
Log in via OpenAthens
Log in via AAO
Log in using your username and password
For personal accounts OR managers of institutional accounts
Username
*
Password
*
Forgot your log in details?
Register a new account?
Forgot
your user name or password?
PDF